The logistic overlay seems to be very demanding on FPS. Since the overlay doesn't have any moving parts, I was wondering if a bug might be happening. Other than that, running Factorio on a 4K monitor is pure sex.

Here's the save .zip with removed mods(yes I removed mods to make sure it still happened) and my system state during the map's logistic view. I'm standing at one of the slower spots. The video card is maxed out and FPS can't keep up.

Hovering over a roboport in normal view doesn't cause the same slowdown. It's strictly a result of the logistic overlay.

system status

logi slow.jpg (598.26 KiB) Viewed 1950 times

Zoom in to this level and click the logistic overlay on and off. It's a huge difference.

Whoops! Forgot the log. Windows is set to 150% screen scaling. The regular zoomed out view gives 50% card use and the map view without logistic overlay reports 15%. Win10 reports the usage type as "3D" whatever that means.

I see the new roboport debug tool. Nice. Unfortunately the roboport overly doesn't seem to be the issue. I did however find the slowdown tied to the "flip[off]" process, whatever that is. I had slowdown on a new game and found the same process eating up the time. Dunno what that's about.

flip.jpg (227.77 KiB) Viewed 1870 times

Edit: Another part of the base that slows down a huge amount. It is an extremely busy bot outpost that handles all the GC. The difference between overlay and non mode is shown. The "flip" process seems to enjoy jumping between 0.3ms and extreme slowdown with not much difference in between. I couldn't duplicate the effect in my new game, since whatever caused slow down was gone when I restarted.

Hovering over a roboport in normal view doesn't cause the same slowdown. It's strictly a result of the logistic overlay.

I am sorry, I've missed this back in May/June, so I didn't realize the problem was due to using less efficient method of drawing the overlay in map (especially when zoomed-in) than in normal game view.